My dad actually had a needle snap when they were drawing blood from him (as in, the nurse got one half and he kept the other). He ended up more calm than the nurse, from what I hear. And I know how you feel with the needle thing - I'm starting to get over it with all the pre-medical visits to Occupational Health, though.
I have a bit of mild eczema, like many, so I've got a little bit of advice to impart. Firstly, cotton clothing only (at least until the tests come back) - polyester and wool don't really help matters. Secondly, that moisturiser that you were given goes on your arms/legs/wherever as soon as you're out of the shower/bath especially - when your pores are still open to it. Thirdly, as a long shot, I've been told that cutting down on dairy products may help matters - of course, as a milk drinker, I didn't follow the advice, so I'm guessing it's no big deal.
Can I ask if you're asthmatic, OP?